Thanks for writing in.
What has happened in that the red "bump" that you had has become secondarily infected due to constant picking. When we pick at a wound or a pimple for that matter, we run the risk of introducing a bacterial infection into it as bacteria are normally present on our skin.
I would suggest you keep this area dry and clean and put some mupirocin
on it. This will take care of this. Also, please don't touch it again and again.
Hope this helps.